Patent US2598617A successfully refreshed from Google Patents.
US2598617A
Expired / Lapsed
US
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Alternating electric current transformer
Assignee: Westinghouse Air Brake Co
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Filing: 1948-11-17
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Granted: 1952-05-27
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Expires: 1968-11-17
Abstract
No abstract record available.
Inventors
- 👤 Stimler Saul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:56
CPC Classifications
H; H03; H03F; H03F9/00; H03F9/02; H01; H01F; H01F29/00; H01F29/14; H01F29/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1862204A
Cited
US2281593A
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US2276032A
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US2352299A
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US2338080A
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US2434493A
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US2444715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |